Mask, but also the mask doubled over?
As in, I want to check a password from a mask, but I also speculate that maybe someone pasted their password twice, so I want to check the password doubled over. 
Then I can check lengths 4-7 but also be checking a few passwords at lengths 8-14
A possible solution could be piping the --stdout of maskattack to another hashcat with only "do nothing" and "make double"-rule in it.

hashcat --stdout -a3 ?a?a?a?a?a?a?a --increment-min=4 | hashcat HASH.txt -r RULE.txt
Helpful, thanks. That'll work